In the sixth month of pregnancy, the abdomen is already more obviously bulging, which will squeeze the internal organs elsewhere accordingly and will also elevate the diaphragm. The diaphragm is a septum between our thoracic and abdominal cavities. If the septum is elevated, it will affect the expansion of the lungs and may cause breathing difficulties, especially in certain positions, which may be more pronounced, and this is the most common cause of breathing difficulties after pregnancy. Other less common causes are hypertension or hypertension, which may affect the heart function, resulting in some mild cardiac insufficiency, and dyspnea, even with a decrease in activity tolerance. To summarize, the most common cause is the elevation of the diaphragm due to abdominal panglossia, which can be avoided by maintaining the body position.